Think this is a terrible idea. Really isn't the player we need, we have Cavani as the experienced striker and Greenwood as a great player going through with Martial as a decent 3rd choice. Bringing in Ronaldo putting him on wages that are likely to make Sanchez look cheap is going completely F'up and squad harmony we have and raise the expectations of every player we negotiate with.
Plus Ronaldo at this stage of his career is going to be a squad player, he is 36, 37 within this season. He is not going to be able to play every game, I can't imagine him dealing with sitting on the bench very well or being subbed. Plus having your highest earner as a player who can't play every week is always a stupid idea.
This is just an all-around awful idea! Muppets with love it and tell me I'm wrong, but this will only end badly.